EFFECT OF ASPECT RATIO ON VORTEX-INDUCED MOTION CHARACTERISTICS OF FLOATING WIND TURBINE

Li Lei; Xia Haishan; Wang Jikun; Meng Zhanbin; Bai Xinglan

doi:10.19912/j.0254-0096.tynxb.2024-0748

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (9) : 58-65. DOI: 10.19912/j.0254-0096.tynxb.2024-0748

EFFECT OF ASPECT RATIO ON VORTEX-INDUCED MOTION CHARACTERISTICS OF FLOATING WIND TURBINE

Li Lei¹, Xia Haishan¹, Wang Jikun², Meng Zhanbin^3,4, Bai Xinglan¹

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Abstract

This study investigates the impact of the L/D ratio on the VIM characteristics of floating wind turbine foundations. Numerical simulations were conducted using an improved delayed detached eddy simulation （IDDES） model, integrated with dynamic mesh technology. The effect is studied through the vortex-induced motion of floating cylindrical structures. The analysis includes motion amplitude, frequency characteristics, motion trajectories, and wake structures. The findings reveal that the H/D ratio significantly influences sway motion, followed by heave motion, with negligible impact on yaw motion. An increase in the H/D ratio expands the lock-in region, intensifying vortex-induced resonance responses. No VIM is observed at an H/D ratio of 0.5; at this ratio, the natural frequency increases linearly with reduced velocity, and the motion trajectory is irregular. VIM occurs when the H/D ratio is greater than or equal to 1.0, and the motion trajectory evolves into a regular figure-eight shape as the H/D ratio increases. These results underscore the importance of the H/D ratio in influencing vortex-induced resonance in floating cylindrical structures.

Key words

offshore floating wind turbines / dynamic characteristics / floating cylinder / numerical simulation / aspect ratio

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Li Lei, Xia Haishan, Wang Jikun, Meng Zhanbin, Bai Xinglan. EFFECT OF ASPECT RATIO ON VORTEX-INDUCED MOTION CHARACTERISTICS OF FLOATING WIND TURBINE[J]. Acta Energiae Solaris Sinica. 2025, 46(9): 58-65 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0748

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